Malicious PDF — malware analysis report

Static analysis result for SHA-256 0296611519e61143…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 21:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88c0f4162946800bf69b90e0cbb87bb0 SHA-1: 3858e2463335eea724f8d89eb4c628a5644236c6 SHA-256: 0296611519e61143f683962286cb6ded4af0620d6e5081d344dc00644864b5eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=cool+phone+wallpapers`. The document body, though heavily obfuscated, also contains this URL, indicating a lure for users to click on potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=cool+phone+wallpapers
    • http://xuseku.bibisnelderwaardbrion.com/uploads/1/3/1/8/131856166/ribefiruwobita.pdf
    • http://webaxiza.shopstudio233.com/uploads/1/3/1/0/131070355/legiboge-wupaje-bokufe-demutodapufek.pdf
    • http://files.soundsofworship.com/uploads/1/3/1/6/131637362/5528954.pdf
    • http://kivuvovi.electronpotential.com/uploads/1/3/1/4/131453109/6335881.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6104/1569/files/foluzivuzegapunabuvan.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2819/files/patofisiologi_gastroenteritis_akut.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/budgeting_worksheets_for_adults_uk.pdf
    • https://cdn.shopify.com/s/files/1/0461/0424/8484/files/kituvud.pdf
    • https://cdn.shopify.com/s/files/1/0438/9784/7976/files/difference_between_verbal_and_non_verbal_communication.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/darawavimirovuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1336/files/aashiqui_2_all_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/bovivumagebetawitexonaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9947/2551/files/aprendizaje_definicion_autores.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/xibakaxefugug.pdf
    • https://cdn.shopify.com/s/files/1/0435/5227/6632/files/easy_learning_chinese_characters.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/79228522118.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/search_engine_definition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006527.bin
7baf0ab143dad899965475df95c48bb5f54f73c45f8ea119de5f88228f31141b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6527 4904 bytes
font_01_sfnt_off000075d6.bin
72d4a92e4b2a6963ec61dedf514bd43be269480551b42e183581fa079936cabb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D6 10376 bytes

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